413083 ÷ 18 
The aim is to understand the frequency of 18 in 413083.

Step 1:
If we divide 4 by 18, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 18

Step 2:
The number 18 fits into 41 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 36 from 41 and we're left with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 18

Advancing to step 3:
If we divide 53 by 18, we get 2 and a remainder of 17.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Deduct 36 from 53 and we're left with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 18

Step 4:
If we divide 170 by 18, we get 9 and a remainder of 8.
Write down 9 as next digit of the result. 
Result so far: 229.0
Subtract 162 from 170 to get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 18

Moving on to step 5:
18 can be fit into 88 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 2294.0
If we take 72 away from 88, we end up with 16.
Take the next digit (3) from the dividend and append it to 16, then repeat: 163 / 18

Step 6:
163 divided by 18 is 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 22949.0
If we take 162 away from 163, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
The number 18 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 22949.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
When dividing 100 by 18, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 22949.05
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
If we divide 100 by 18, we get 5 and a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 22949.055
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 22949.055 and a remainder of 0.001.